For me, it doesn't depend on the applications involved -- Excel, Access, browser, iTunes, SQL Server Mgmt Studio, VBA environment (even between different code windows within this), email client, Windows Explorer, etc. Ever since this last batch of updates
(late last week at home, Monday here at work), the mouse will scroll onlythe active window, regardless of what that or any other window on the screen is. I've tried toggling the feature off, closing the Settings panel, then turning it back on, but it makes no difference. It's broken.
I hadn't realized how much I counted on this feature until it quit working. A fix for this bug would be much appreciated.